Finding the Fourth Proportional to 139,149.92, 208,756.72 and 60,277.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,149.92 : 208,756.72 = 60,277.28 : x
2. Step 2: Convert to fraction form
   139,149.92/208,756.72 = 60,277.28/x
3. Step 3: Cross multiply
   139,149.92x = 208,756.72 × 60,277.28
4. Step 4: Simplify right side
   139,149.92x = 12,583,287,263.32
5. Step 5: Solve for x
   x = 12,583,287,263.32/139,149.92
6. Step 6: Final answer
   x = 90,429.71